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                    updateSuspenseComponent
            
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                    updatePortalComponent
            
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                    updateForwardRef
            
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                    updateContextProvider
            
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                    commit 阶段
            
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                    commitRoot
            
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                    invokeGuardedCallback
            
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                    commitBeforeMutationLifecycles
            
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                    commitAllHostEffects
            
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                    commitPlacement
            
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                    commitWork
            
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                    commitDeletion
            
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                    commitAllLifecycle
            
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                    挂起任务的含义
            
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                    lazy 组件
            
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                    其他API
            
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                                <h1 id="suspense">suspense</h1><p>React &#x4E2D;&#x7684;<code>suspendedTime</code>&#x7528;&#x6765;&#x8BB0;&#x5F55;&#x7684;&#x662F;&#x8FD8;&#x6CA1;&#x6709;&#x88AB;&#x63D0;&#x4EA4;&#x4F46;&#x662F;&#x5DF2;&#x7ECF;&#x88AB;&#x66F4;&#x65B0;&#x7684;&#x4EFB;&#x52A1;&#xFF0C;&#x5728;&#x8FD9;&#x91CC;&#x9996;&#x5148;&#x6211;&#x8981;&#x8BB2;&#x89E3;&#x4E00;&#x4E2A;&#x6982;&#x5FF5;&#xFF0C;&#x90A3;&#x5C31;&#x662F;<code>finishedWork</code>&#x3002;&#x4E00;&#x5F00;&#x59CB;&#x6211;&#x4EE5;&#x4E3A;<code>finishedWork</code>&#x5B58;&#x50A8;&#x7684;&#x662F;<code>workInProgress</code>&#xFF0C;&#x4E5F;&#x5C31;&#x662F;<code>current</code>&#x7684;&#x5F15;&#x7528;&#xFF0C;&#x90A3;&#x5B58;&#x7684;&#x4E0D;&#x5C31;&#x662F;&#x81EA;&#x5DF1;&#x4E48;&#xFF0C;&#x4F46;&#x662F;&#x540E;&#x6765;&#x6211;&#x5F04;&#x6E05;&#x695A;&#x4E86;&#x3002;&#x8BD5;&#x60F3;&#x6211;&#x4EEC;&#x4ECE;<code>renderRoot</code>&#x5F00;&#x59CB;&#x505A;&#x7684;&#x4E8B;&#x60C5;&#x90FD;&#x662F;&#x5728;<code>workInProgress</code>&#x4E0A;&#x64CD;&#x4F5C;&#x7684;&#xFF0C;&#x8FD9;&#x4E2A;&#x5BF9;&#x8C61;&#x901A;&#x8FC7;&#x8C03;&#x7528;</p><pre><code class="lang-js">nextUnitOfWork = createWorkInProgress(
  nextRoot.current,
  <span class="hljs-literal">null</span>,
  nextRenderExpirationTime,
)

<span class="hljs-keyword">export</span> <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">createWorkInProgress</span>(<span class="hljs-params">
  current: Fiber,
  pendingProps: any,
  expirationTime: ExpirationTime,
</span>): <span class="hljs-title">Fiber</span> </span>{
  <span class="hljs-keyword">let</span> workInProgress = current.alternate
  <span class="hljs-keyword">if</span> (workInProgress === <span class="hljs-literal">null</span>) {
    workInProgress = createFiber(
      current.tag,
      pendingProps,
      current.key,
      current.mode,
    )
    workInProgress.elementType = current.elementType
    workInProgress.type = current.type
    workInProgress.stateNode = current.stateNode

    workInProgress.alternate = current
    current.alternate = workInProgress
  } <span class="hljs-keyword">else</span> {
    workInProgress.pendingProps = pendingProps

    workInProgress.effectTag = NoEffect

    <span class="hljs-comment">// The effect list is no longer valid.</span>
    workInProgress.nextEffect = <span class="hljs-literal">null</span>
    workInProgress.firstEffect = <span class="hljs-literal">null</span>
    workInProgress.lastEffect = <span class="hljs-literal">null</span>
  }

  workInProgress.childExpirationTime = current.childExpirationTime
  workInProgress.expirationTime = current.expirationTime

  workInProgress.child = current.child
  workInProgress.memoizedProps = current.memoizedProps
  workInProgress.memoizedState = current.memoizedState
  workInProgress.updateQueue = current.updateQueue
  workInProgress.firstContextDependency = current.firstContextDependency

  workInProgress.sibling = current.sibling
  workInProgress.index = current.index
  workInProgress.ref = current.ref

  <span class="hljs-keyword">return</span> workInProgress
}</code></pre>
<p>&#x6CE8;&#x610F;&#x8FD9;&#x91CC;&#x8FD4;&#x56DE;&#x7684;&#x662F;&#x4E00;&#x4E2A;&#x65B0;&#x7684;&#x5BF9;&#x8C61;&#xFF0C;&#x5728;&#x66F4;&#x65B0;&#x7684;&#x8FC7;&#x7A0B;&#x4E2D;&#x6211;&#x4EEC;&#x5BF9;&#x4E8E;&#x9700;&#x8981;&#x66F4;&#x65B0;&#x7684;&#x8282;&#x70B9;&#x90FD;&#x4F1A;&#x521B;&#x5EFA;&#x8FD9;&#x4E48;&#x4E00;&#x4E2A;&#x5BF9;&#x8C61;&#xFF0C;&#x5E76;&#x5BF9;&#x5176;&#x62F7;&#x8D1D;&#x5C5E;&#x6027;&#x3002;&#x5BF9;&#x4E8E;&#x539F;&#x59CB;&#x7C7B;&#x578B;&#x7684;&#x6570;&#x636E;&#x90A3;&#x4E48;&#x662F;&#x503C;&#x62F7;&#x8D1D;&#xFF0C;&#x5BF9;&#x4E8E;&#x5F15;&#x7528;&#x7C7B;&#x578B;&#x662F;&#x5426;&#x662F;&#x5F15;&#x7528;&#x62F7;&#x8D1D;&#x5462;&#xFF1F;&#x7B54;&#x6848;&#x662F;&#xFF1A;&#x5BF9;&#x4E8E;&#x5728;&#x66F4;&#x65B0;&#x8FC7;&#x7A0B;&#x4E2D;&#x9700;&#x8981;&#x6539;&#x53D8;&#x7684;&#x5BF9;&#x8C61;&#xFF0C;&#x4F1A;&#x521B;&#x5EFA;&#x4E00;&#x4E2A;&#x65B0;&#x7684;&#x5BF9;&#x8C61;&#xFF0C;&#x8FD9;&#x4E5F;&#x662F;&#x521B;&#x5EFA;<code>workInProgress</code>&#x7684;&#x539F;&#x56E0;&#xFF0C;&#x8FD9;&#x91CC;&#x5C24;&#x5176;&#x9700;&#x8981;&#x6CE8;&#x610F;&#x7684;&#x662F;<code>updateQueue</code>&#xFF0C;&#x5728;&#x8C03;&#x7528;<code>processUpdateQueue</code>&#x7684;&#x65F6;&#x5019;&#xFF0C;&#x6211;&#x4EEC;&#x9700;&#x8981;&#x8C03;&#x7528;&#x4E00;&#x4E2A;&#x65B9;&#x6CD5;</p><pre><code class="lang-js"><span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">ensureWorkInProgressQueueIsAClone</span>&lt;<span class="hljs-title">State</span>&gt;(<span class="hljs-params">
  workInProgress: Fiber,
  queue: UpdateQueue&lt;State&gt;,
</span>): <span class="hljs-title">UpdateQueue</span>&lt;<span class="hljs-title">State</span>&gt; </span>{
  <span class="hljs-keyword">const</span> current = workInProgress.alternate
  <span class="hljs-keyword">if</span> (current !== <span class="hljs-literal">null</span>) {
    <span class="hljs-keyword">if</span> (queue === current.updateQueue) {
      queue = workInProgress.updateQueue = cloneUpdateQueue(queue)
    }
  }
  <span class="hljs-keyword">return</span> queue
}</code></pre>
<p>&#x4E5F;&#x5C31;&#x662F;&#x8BF4;<code>updateQueue</code>&#x4E5F;&#x662F;&#x4E00;&#x4E2A;&#x65B0;&#x7684;&#x5BF9;&#x8C61;&#xFF0C;&#x6240;&#x4EE5;&#x5728;&#x66F4;&#x65B0;&#x8FC7;&#x7A0B;&#x4E2D;&#x6539;&#x53D8;&#x7684;<code>Update</code>&#x7684;&#x987A;&#x5E8F;&#x5173;&#x7CFB;&#xFF0C;&#x5E76;&#x4E0D;&#x4F1A;&#x5F71;&#x54CD;&#x5230;<code>current</code>&#x4E0A;&#x7684;&#x987A;&#x5E8F;&#xFF0C;&#x9700;&#x8981;&#x6CE8;&#x610F;&#x7684;&#x662F;&#x65B0;&#x521B;&#x5EFA;&#x7684;<code>update</code>&#x8C03;&#x7528;<code>enqueueUpdate</code>&#x4F1A;&#x5F80;<code>current</code>&#x548C;<code>workInProgress</code>&#x90FD;&#x63D2;&#x5165;&#x3002;</p><p>&#x8BF4;&#x4E86;&#x8FD9;&#x4E48;&#x591A;&#x6211;&#x5230;&#x5E95;&#x8981;&#x8BF4;&#x4EC0;&#x4E48;&#x5462;&#xFF1F;&#x7B54;&#x6848;&#x5C31;&#x662F;&#x88AB;&#x6302;&#x8D77;&#x7684;<code>work</code>&#x5176;&#x5B9E;&#x5C31;&#x662F;&#x4E0D;&#x628A;<code>workInProgress</code>&#x7684;&#x6574;&#x68F5;&#x6811;&#x8FDB;&#x5165;<code>commit</code>&#x9636;&#x6BB5;&#x7684;&#x64CD;&#x4F5C;&#xFF0C;&#x6302;&#x8D77;&#x662F;&#x4E13;&#x6307;<code>commit</code>&#x7684;&#xFF0C;&#x53EA;&#x6709;<code>commit</code>&#x9636;&#x6BB5;&#x53EF;&#x4EE5;&#x88AB;&#x6302;&#x8D77;&#x3002;&#x800C;&#x88AB;&#x6302;&#x8D77;&#x7684;&#x63D0;&#x4EA4;&#xFF0C;&#x9664;&#x4E86;<code>timeout</code>&#x7684;&#x60C5;&#x51B5;&#xFF0C;&#x6211;&#x4EEC;&#x90FD;&#x53EF;&#x4EE5;&#x8BA4;&#x4E3A;&#x8FD9;&#x6B21;&#x66F4;&#x65B0;&#x88AB;&#x629B;&#x5F03;&#x4E86;&#x3002;</p><h3 id="ontimeout">onTimeout</h3><p><code>root.timeoutHandler</code>&#x7528;&#x6765;&#x8BB0;&#x5F55;&#x5B50;&#x6811;&#x4E2D;&#x9700;&#x8981;<code>timeout</code>&#x6267;&#x884C;&#x7684;&#x4EFB;&#x52A1;&#xFF0C;&#x8FD9;&#x7C7B;&#x4EFB;&#x52A1;&#x88AB;&#x6302;&#x8D77;&#x7684;&#x539F;&#x56E0;&#x4E00;&#x822C;&#x662F;&#x56E0;&#x4E3A;&#x629B;&#x51FA;&#x4E86;<code>promise</code>&#xFF0C;&#x5E76;&#x4E14;&#x81EA;&#x4E0A;&#x6B21;&#x63D0;&#x4EA4;&#x7ECF;&#x8FC7;&#x4E86;<code>maxDruation</code>&#x65F6;&#x95F4;&#x7684;&#x4EFB;&#x52A1;&#xFF0C;<code>nextLatestAbsoluteTimeoutMs</code>&#x5C31;&#x662F;&#x7528;&#x6765;&#x8BB0;&#x5F55;&#x5B50;&#x6811;&#x4E2D;&#x4F18;&#x5148;&#x7EA7;&#x6700;&#x9AD8;&#x7684;&#x9700;&#x8981;&#x63D0;&#x4EA4;&#x7684;&#x88AB;&#x6302;&#x8D77;&#x7684;&#x4EFB;&#x52A1;&#x7684;&#x3002;&#x88AB;&#x6302;&#x8D77;&#x4EE3;&#x8868;&#x4E86;&#x4EFB;&#x52A1;&#x5DF2;&#x7ECF;&#x66F4;&#x65B0;&#x5B8C;&#x6210;&#xFF0C;&#x4F46;&#x662F;&#x56E0;&#x4E3A;&#x4E00;&#x4E9B;&#x539F;&#x56E0;&#x4E0D;&#x9700;&#x8981;&#x7ACB;&#x9A6C;&#x63D0;&#x4EA4;&#xFF0C;&#x6BD4;&#x5982;&#xFF1A;</p><ul><li>&#x6709;&#x9519;&#x8BEF;&#x51FA;&#x73B0;&#xFF0C;&#x5E76;&#x4E14;&#x6709;&#x4F4E;&#x4F18;&#x5148;&#x7EA7;&#x7684;&#x66F4;&#x65B0;&#xFF0C;&#x90A3;&#x4E48;&#x53EF;&#x4EE5;&#x8DDF;&#x4F4E;&#x4F18;&#x5148;&#x7EA7;&#x7684;&#x66F4;&#x65B0;&#x4E00;&#x8D77;&#x88AB;&#x63D0;&#x4EA4;
</li>
<li>&#x6709;&#x9519;&#x8BEF;&#x4F46;&#x662F;&#x6CA1;&#x6709;&#x4F4E;&#x4F18;&#x5148;&#x7EA7;&#x7684;&#x4EFB;&#x52A1;&#xFF0C;&#x53D1;&#x8D77;&#x4E00;&#x6B21;&#x540C;&#x6B65;&#x7684;&#x66F4;&#x65B0;&#xFF0C;&#x518D;&#x6B21;&#x6267;&#x884C;&#x88AB;&#x6302;&#x8D77;&#x7684;&#x4F18;&#x5148;&#x7EA7;&#x7684;&#x4EFB;&#x52A1;
</li>
<li><code>Suspense</code>&#x7EC4;&#x4EF6;&#x63A5;&#x6536;&#x5230;&#x5F02;&#x5E38;&#x7684;&#x60C5;&#x51B5;&#xFF0C;&#x6839;&#x636E;&#x60C5;&#x51B5;&#x6302;&#x8D77;&#x4E00;&#x4E9B;&#x65F6;&#x95F4;&#xFF0C;&#x6700;&#x957F;&#x4E3A;&#x4F18;&#x5148;&#x7EA7;&#x6700;&#x9AD8;&#x7684;&#x4EFB;&#x52A1;&#x7684;&#x8FC7;&#x671F;&#x65F6;&#x95F4;&#xFF0C;&#x5982;&#x679C;&#x8D85;&#x65F6;&#x4F1A;&#x6267;&#x884C;<code>flushRoot</code>&#x5F3A;&#x5236;&#x63D0;&#x4EA4;
</li></ul>
<p>&#x9700;&#x8981;&#x6CE8;&#x610F;&#x7684;&#x662F;&#xFF0C;&#x88AB;&#x6302;&#x8D77;&#x7684;&#x4EFB;&#x52A1;&#x53EA;&#x6709;<code>Suspense</code>&#x7684;&#x60C5;&#x51B5;&#x662F;&#x8BBE;&#x7F6E;&#x4E86;<code>timeout</code>&#x7684;&#xFF0C;&#x4F46;&#x662F;&#x4E0D;&#x4EE3;&#x8868;&#x4ED6;&#x4E00;&#x5B9A;&#x8981;&#x7B49;&#x5230;<code>timeout</code>&#x624D;&#x4F1A;&#x88AB;&#x63D0;&#x4EA4;&#xFF0C;&#x4EE5;&#x4E0B;&#x60C5;&#x51B5;&#x90FD;&#x4F1A;&#x63D0;&#x65E9;&#x63D0;&#x4EA4;&#xFF1A;</p><ul><li>&#x6709;&#x4EFB;&#x52A1;&#x7684;<code>expirationTime</code>&#x5C0F;&#x4E8E;<code>timeout</code>&#x7684;&#x65F6;&#x957F;
</li>
<li>&#x5728;<code>timeout</code>&#x671F;&#x95F4;&#x540C;&#x4E00;&#x5B50;&#x6811;&#x4EA7;&#x751F;&#x4E86;&#x65B0;&#x7684;&#x66F4;&#x65B0;&#xFF0C;&#x8FDE;&#x540C;<code>Suspense</code>&#x7EC4;&#x4EF6;&#x4E00;&#x8D77;&#x66F4;&#x65B0;&#x4E86;
</li>
<li><code>Promise</code>&#x72B6;&#x6001;&#x6539;&#x53D8;&#xFF0C;&#x8C03;&#x5EA6;&#x4E86;&#x65B0;&#x7684;&#x66F4;&#x65B0;
</li></ul>
<p>&#x8BBE;&#x7F6E;&#x4E86;<code>timeoutHandler</code>&#x4E4B;&#x540E;&#xFF0C;&#x5728;&#x4E0B;&#x4E00;&#x6B21;&#x5F00;&#x59CB;&#x66F4;&#x65B0;&#x4E4B;&#x524D;&#x4F1A;&#x6E05;&#x9664;<code>handler</code>&#xFF0C;&#x5982;&#x679C;&#x65B0;&#x7684;&#x66F4;&#x65B0;&#x6539;&#x53D8;&#x4E86;<code>isExpire</code>&#x6216;&#x8005;<code>nextLatestAbsoluteTimeoutMs</code>&#xFF0C;&#x90A3;&#x4E48;&#x4F1A;&#x5BFC;&#x81F4;<code>timeoutHandler</code>&#x53D8;&#x5316;&#xFF0C;&#x751A;&#x81F3;&#x4E0D;&#x9700;&#x8981;<code>timeout</code></p><h3 id="retry">retry</h3><p><code>retry</code>&#x53EA;&#x662F;&#x7B80;&#x5355;&#x5730;&#x53D1;&#x8D77;&#x4E00;&#x6B21;&#x65B0;&#x7684;&#x8C03;&#x5EA6;&#xFF0C;&#x6240;&#x4EE5;&#x5E76;&#x4E0D;&#x5173;&#x5FC3;&#x65B0;&#x7684;&#x6E32;&#x67D3;&#x662F;&#x5426;&#x8FD8;&#x9700;&#x8981;&#x8FD9;&#x4E2A;<code>promise</code>&#x8FD4;&#x56DE;&#x7684;&#x6570;&#x636E;&#x3002;</p><p>&#x5728;<code>retry</code>&#x7684;&#x65F6;&#x5019;&#xFF0C;&#x5982;&#x679C;&#x4ED6;&#x5904;&#x4E8E;<code>ConcurrentMode</code>&#xFF0C;&#x90A3;&#x4E48;&#x53EA;&#x9700;&#x8981;&#x91CD;&#x65B0;&#x8BBE;&#x7F6E;&#x8282;&#x70B9;&#x7684;<code>expirationTime</code>&#x4E3A;<code>retryTime</code>&#x5373;&#x53EF;</p><p><strong>&#x8FD9;&#x91CC;&#x6CE8;&#x610F;&#xFF0C;&#x56E0;&#x4E3A;&#x540C;&#x6B65;&#x6A21;&#x5F0F;&#x4E0B;<code>Suspense</code>&#x7EC4;&#x4EF6;&#x76F4;&#x63A5;&#x6E32;&#x67D3;<code>null</code>&#xFF0C;&#x4E0D;&#x4F1A;&#x50CF;&#x5F02;&#x6B65;&#x6A21;&#x5F0F;&#x4E0B;&#x4E00;&#x6837;&#x64CD;&#x4F5C;&#xFF0C;&#x6240;&#x4EE5;&#x540C;&#x6B65;&#x6A21;&#x5F0F;&#x4E0B;&#x4ED6;&#x5DF2;&#x7ECF;&#x6CA1;&#x6709;&#x66F4;&#x65B0;&#x4E86;&#xFF0C;&#x6240;&#x4EE5;&#x9700;&#x8981;&#x521B;&#x5EFA;&#x65B0;&#x7684;&#x66F4;&#x65B0;</strong></p><h3 id="error">error</h3><p>&#x6CE8;&#x610F;&#x91CD;&#x65B0;&#x53D1;&#x8D77;&#x4E00;&#x6B21;&#x540C;&#x6B65;&#x8BF7;&#x6C42;&#x7684;&#x6761;&#x4EF6;&#x662F;&#x6BD4;&#x8F83;&#x82DB;&#x523B;&#x7684;&#xFF0C;&#x5C31;&#x662F;&#x8981;&#x7B26;&#x5408;<code>!root.didError</code>&#x548C;<code>!isExpire</code>&#xFF0C;&#x4E5F;&#x5C31;&#x662F;&#x540C;&#x6B65;&#x4EFB;&#x52A1;&#x662F;&#x4E0D;&#x4F1A;&#x8FDB;&#x5165;&#x8FD9;&#x4E2A;&#x5206;&#x652F;&#x7684;&#xFF0C;&#x53EA;&#x4F1A;&#x76F4;&#x63A5;&#x63D0;&#x4EA4;&#x3002;</p>
                                
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